// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <stddef.h>

#include "base/environment.h"
#include "base/files/file_util.h"
#include "base/i18n/case_conversion.h"
#include "base/i18n/rtl.h"
#include "base/macros.h"
#include "base/path_service.h"
#include "base/stl_util.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/scoped_path_override.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
#include "third_party/icu/source/common/unicode/locid.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/l10n/l10n_util_collator.h"
#include "ui/base/ui_base_paths.h"

#if defined(OS_POSIX) && !defined(OS_MACOSX)
#include <cstdlib>
#endif

#if defined(OS_WIN)
#include "base/win/windows_version.h"
#endif

#if !defined(OS_MACOSX)
#include "ui/base/test/data/resource.h"
#endif

using base::ASCIIToUTF16;
using base::UTF8ToUTF16;

namespace {

class StringWrapper {
public:
    explicit StringWrapper(const base::string16& string)
        : string_(string)
    {
    }
    const base::string16& string() const { return string_; }

private:
    base::string16 string_;

    DISALLOW_COPY_AND_ASSIGN(StringWrapper);
};

} // namespace

class L10nUtilTest : public PlatformTest {
};

#if defined(OS_WIN)
// TODO(beng): disabled until app strings move to app.
TEST_F(L10nUtilTest, DISABLED_GetString)
{
    std::string s = l10n_util::GetStringUTF8(IDS_SIMPLE);
    EXPECT_EQ(std::string("Hello World!"), s);

    s = l10n_util::GetStringFUTF8(IDS_PLACEHOLDERS,
        UTF8ToUTF16("chrome"),
        UTF8ToUTF16("10"));
    EXPECT_EQ(std::string("Hello, chrome. Your number is 10."), s);

    base::string16 s16 = l10n_util::GetStringFUTF16Int(IDS_PLACEHOLDERS_2, 20);
    EXPECT_EQ(UTF8ToUTF16("You owe me $20."), s16);
}
#endif // defined(OS_WIN)

#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
// On Mac, we are disabling this test because GetApplicationLocale() as an
// API isn't something that we'll easily be able to unit test in this manner.
// The meaning of that API, on the Mac, is "the locale used by Cocoa's main
// nib file", which clearly can't be stubbed by a test app that doesn't use
// Cocoa.

// On Android, we are disabling this test since GetApplicationLocale() just
// returns the system's locale, which, similarly, is not easily unit tested.

#if defined(OS_POSIX) && defined(USE_GLIB) && !defined(OS_CHROMEOS)
const bool kPlatformHasDefaultLocale = 1;
const bool kUseLocaleFromEnvironment = 1;
const bool kSupportsLocalePreference = 0;
#elif defined(OS_WIN)
const bool kPlatformHasDefaultLocale = 1;
const bool kUseLocaleFromEnvironment = 0;
const bool kSupportsLocalePreference = 1;
#else
const bool kPlatformHasDefaultLocale = 0;
const bool kUseLocaleFromEnvironment = 0;
const bool kSupportsLocalePreference = 1;
#endif

void SetDefaultLocaleForTest(const std::string& tag, base::Environment* env)
{
    if (kUseLocaleFromEnvironment)
        env->SetVar("LANGUAGE", tag);
    else
        base::i18n::SetICUDefaultLocale(tag);
}

TEST_F(L10nUtilTest, GetAppLocale)
{
    scoped_ptr<base::Environment> env;
    // Use a temporary locale dir so we don't have to actually build the locale
    // pak files for this test.
    base::ScopedPathOverride locale_dir_override(ui::DIR_LOCALES);
    base::FilePath new_locale_dir;
    ASSERT_TRUE(PathService::Get(ui::DIR_LOCALES, &new_locale_dir));
    // Make fake locale files.
    std::string filenames[] = {
        "en-US",
        "en-GB",
        "fr",
        "es-419",
        "es",
        "zh-TW",
        "zh-CN",
        "he",
        "fil",
        "nb",
        "am",
        "ca",
        "ca@valencia",
    };

    for (size_t i = 0; i < arraysize(filenames); ++i) {
        base::FilePath filename = new_locale_dir.AppendASCII(
            filenames[i] + ".pak");
        base::WriteFile(filename, "", 0);
    }

    // Keep a copy of ICU's default locale before we overwrite it.
    const std::string original_locale = base::i18n::GetConfiguredLocale();

    if (kPlatformHasDefaultLocale && kUseLocaleFromEnvironment) {
        env.reset(base::Environment::Create());

        // Test the support of LANGUAGE environment variable.
        base::i18n::SetICUDefaultLocale("en-US");
        env->SetVar("LANGUAGE", "xx:fr_CA");
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("fr", icu::Locale::getDefault().getLanguage());

        env->SetVar("LANGUAGE", "xx:yy:en_gb.utf-8@quot");
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        env->SetVar("LANGUAGE", "xx:zh-hk");
        EXPECT_EQ("zh-TW", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        // We emulate gettext's behavior here, which ignores LANG/LC_MESSAGES/LC_ALL
        // when LANGUAGE is specified. If no language specified in LANGUAGE is
        // valid,
        // then just fallback to the default language, which is en-US for us.
        base::i18n::SetICUDefaultLocale("fr-FR");
        env->SetVar("LANGUAGE", "xx:yy");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        env->SetVar("LANGUAGE", "/fr:zh_CN");
        EXPECT_EQ("zh-CN", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        // Test prioritization of the different environment variables.
        env->SetVar("LANGUAGE", "fr");
        env->SetVar("LC_ALL", "es");
        env->SetVar("LC_MESSAGES", "he");
        env->SetVar("LANG", "nb");
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("fr", icu::Locale::getDefault().getLanguage());
        env->UnSetVar("LANGUAGE");
        EXPECT_EQ("es", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());
        env->UnSetVar("LC_ALL");
        EXPECT_EQ("he", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("he", icu::Locale::getDefault().getLanguage());
        env->UnSetVar("LC_MESSAGES");
        EXPECT_EQ("nb", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("nb", icu::Locale::getDefault().getLanguage());
        env->UnSetVar("LANG");

        SetDefaultLocaleForTest("ca", env.get());
        EXPECT_EQ("ca", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("ca", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("ca-ES", env.get());
        EXPECT_EQ("ca", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("ca", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("ca@valencia", env.get());
        EXPECT_EQ("ca@valencia", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("ca", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("ca_ES@valencia", env.get());
        EXPECT_EQ("ca@valencia", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("ca", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("ca_ES.UTF8@valencia", env.get());
        EXPECT_EQ("ca@valencia", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("ca", icu::Locale::getDefault().getLanguage());
    }

    SetDefaultLocaleForTest("en-US", env.get());
    EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(std::string()));
    EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

    SetDefaultLocaleForTest("xx", env.get());
    EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(std::string()));
    EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

    if (!kPlatformHasDefaultLocale) {
        // ChromeOS & embedded use only browser prefs in GetApplicationLocale(),
        // ignoring the environment, and default to en-US. Other platforms honor
        // the default locale from the OS or environment.
        SetDefaultLocaleForTest("en-GB", env.get());
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(""));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-US", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("en-GB"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-US", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("en-AU"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-US", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("en-NZ"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-US", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("en-CA"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-US", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("en-ZA"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
    } else {
        // Most platforms have an OS-provided locale. This locale is preferred.
        SetDefaultLocaleForTest("en-GB", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("fr-CA", env.get());
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("fr", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("es-MX", env.get());
        EXPECT_EQ("es-419", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("es-AR", env.get());
        EXPECT_EQ("es-419", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("es-ES", env.get());
        EXPECT_EQ("es", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("es", env.get());
        EXPECT_EQ("es", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("zh-HK", env.get());
        EXPECT_EQ("zh-TW", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("zh-MO", env.get());
        EXPECT_EQ("zh-TW", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("zh-SG", env.get());
        EXPECT_EQ("zh-CN", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-CA", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-AU", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-NZ", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        SetDefaultLocaleForTest("en-ZA", env.get());
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale(std::string()));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
    }

    SetDefaultLocaleForTest("en-US", env.get());

    if (kSupportsLocalePreference) {
        // On windows, the user can override the locale in preferences.
        base::i18n::SetICUDefaultLocale("en-US");
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale("fr"));
        EXPECT_STREQ("fr", icu::Locale::getDefault().getLanguage());
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale("fr-CA"));
        EXPECT_STREQ("fr", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("en-US");
        // Aliases iw, no, tl to he, nb, fil.
        EXPECT_EQ("he", l10n_util::GetApplicationLocale("iw"));
        EXPECT_STREQ("he", icu::Locale::getDefault().getLanguage());
        EXPECT_EQ("nb", l10n_util::GetApplicationLocale("no"));
        EXPECT_STREQ("nb", icu::Locale::getDefault().getLanguage());
        EXPECT_EQ("fil", l10n_util::GetApplicationLocale("tl"));
        EXPECT_STREQ("fil", icu::Locale::getDefault().getLanguage());
        // es-419 and es-XX (where XX is not Spain) should be
        // mapped to es-419 (Latin American Spanish).
        EXPECT_EQ("es-419", l10n_util::GetApplicationLocale("es-419"));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());
        EXPECT_EQ("es", l10n_util::GetApplicationLocale("es-ES"));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());
        EXPECT_EQ("es-419", l10n_util::GetApplicationLocale("es-AR"));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("es-AR");
        EXPECT_EQ("es", l10n_util::GetApplicationLocale("es"));
        EXPECT_STREQ("es", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("zh-HK");
        EXPECT_EQ("zh-CN", l10n_util::GetApplicationLocale("zh-CN"));
        EXPECT_STREQ("zh", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("he");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale("en"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("he");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale("en", false));
        EXPECT_STREQ("he", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale("xx", false));
        EXPECT_STREQ("de", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("fr", l10n_util::GetApplicationLocale("fr", false));
        EXPECT_STREQ("de", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale("en", false));
        EXPECT_STREQ("de", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale("en-US", true));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
    } else {
        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(std::string(), false));
        EXPECT_STREQ("de", icu::Locale::getDefault().getLanguage());

        base::i18n::SetICUDefaultLocale("de");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(std::string(), true));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
    }

#if defined(OS_WIN)
    // Amharic should be blocked unless OS is Vista or newer.
    if (base::win::GetVersion() < base::win::VERSION_VISTA) {
        base::i18n::SetICUDefaultLocale("am");
        EXPECT_EQ("en-US", l10n_util::GetApplicationLocale(""));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
        base::i18n::SetICUDefaultLocale("en-GB");
        EXPECT_EQ("en-GB", l10n_util::GetApplicationLocale("am"));
        EXPECT_STREQ("en", icu::Locale::getDefault().getLanguage());
    } else {
        base::i18n::SetICUDefaultLocale("am");
        EXPECT_EQ("am", l10n_util::GetApplicationLocale(""));
        EXPECT_STREQ("am", icu::Locale::getDefault().getLanguage());
        base::i18n::SetICUDefaultLocale("en-GB");
        EXPECT_EQ("am", l10n_util::GetApplicationLocale("am"));
        EXPECT_STREQ("am", icu::Locale::getDefault().getLanguage());
    }
#endif // defined(OS_WIN)

    // Clean up.
    base::i18n::SetICUDefaultLocale(original_locale);
}
#endif // !defined(OS_MACOSX)

TEST_F(L10nUtilTest, SortStringsUsingFunction)
{
    std::vector<StringWrapper*> strings;
    strings.push_back(new StringWrapper(UTF8ToUTF16("C")));
    strings.push_back(new StringWrapper(UTF8ToUTF16("d")));
    strings.push_back(new StringWrapper(UTF8ToUTF16("b")));
    strings.push_back(new StringWrapper(UTF8ToUTF16("a")));
    l10n_util::SortStringsUsingMethod("en-US",
        &strings,
        &StringWrapper::string);
    ASSERT_TRUE(UTF8ToUTF16("a") == strings[0]->string());
    ASSERT_TRUE(UTF8ToUTF16("b") == strings[1]->string());
    ASSERT_TRUE(UTF8ToUTF16("C") == strings[2]->string());
    ASSERT_TRUE(UTF8ToUTF16("d") == strings[3]->string());
    STLDeleteElements(&strings);
}

/**
 * Helper method for validating strings that require direcitonal markup.
 * Checks that parentheses are enclosed in appropriate direcitonal markers.
 */
void CheckUiDisplayNameForLocale(const std::string& locale,
    const std::string& display_locale,
    bool is_rtl)
{
    EXPECT_EQ(true, base::i18n::IsRTL());
    base::string16 result = l10n_util::GetDisplayNameForLocale(locale,
        display_locale,
        /* is_for_ui */ true);

    bool rtl_direction = true;
    for (size_t i = 0; i < result.length() - 1; i++) {
        base::char16 ch = result.at(i);
        switch (ch) {
        case base::i18n::kLeftToRightMark:
        case base::i18n::kLeftToRightEmbeddingMark:
            rtl_direction = false;
            break;
        case base::i18n::kRightToLeftMark:
        case base::i18n::kRightToLeftEmbeddingMark:
            rtl_direction = true;
            break;
        case '(':
        case ')':
            EXPECT_EQ(is_rtl, rtl_direction);
        }
    }
}

TEST_F(L10nUtilTest, GetDisplayNameForLocale)
{
    // TODO(jungshik): Make this test more extensive.
    // Test zh-CN and zh-TW are treated as zh-Hans and zh-Hant.
    base::string16 result = l10n_util::GetDisplayNameForLocale("zh-CN", "en", false);
    EXPECT_EQ(ASCIIToUTF16("Chinese (Simplified)"), result);

    result = l10n_util::GetDisplayNameForLocale("zh-TW", "en", false);
    EXPECT_EQ(ASCIIToUTF16("Chinese (Traditional)"), result);

    // tl and fil are not identical to be strict, but we treat them as
    // synonyms.
    result = l10n_util::GetDisplayNameForLocale("tl", "en", false);
    EXPECT_EQ(l10n_util::GetDisplayNameForLocale("fil", "en", false), result);

    result = l10n_util::GetDisplayNameForLocale("pt-BR", "en", false);
    EXPECT_EQ(ASCIIToUTF16("Portuguese (Brazil)"), result);

    result = l10n_util::GetDisplayNameForLocale("es-419", "en", false);
    EXPECT_EQ(ASCIIToUTF16("Spanish (Latin America)"), result);

    result = l10n_util::GetDisplayNameForLocale("mo", "en", false);
    EXPECT_EQ(l10n_util::GetDisplayNameForLocale("ro-MD", "en", false), result);

    result = l10n_util::GetDisplayNameForLocale("-BR", "en", false);
    EXPECT_EQ(ASCIIToUTF16("Brazil"), result);

    result = l10n_util::GetDisplayNameForLocale("xyz-xyz", "en", false);
    EXPECT_EQ(ASCIIToUTF16("xyz (XYZ)"), result);

    // Make sure that en-GB locale has the corect display names.
    result = l10n_util::GetDisplayNameForLocale("en", "en-GB", false);
    EXPECT_EQ(ASCIIToUTF16("English"), result);
    result = l10n_util::GetDisplayNameForLocale("es-419", "en-GB", false);
    EXPECT_EQ(ASCIIToUTF16("Spanish (Latin America)"), result);

    // Check for directional markers when using RTL languages to ensure that
    // direction neutral characters such as parentheses are properly formatted.

    // Keep a copy of ICU's default locale before we overwrite it.
    const std::string original_locale = base::i18n::GetConfiguredLocale();

    base::i18n::SetICUDefaultLocale("he");
    CheckUiDisplayNameForLocale("en-US", "en", false);
    CheckUiDisplayNameForLocale("en-US", "he", true);

    // Clean up.
    base::i18n::SetICUDefaultLocale(original_locale);

    // ToUpper and ToLower should work with embedded NULLs.
    const size_t length_with_null = 4;
    base::char16 buf_with_null[length_with_null] = { 0, 'a', 0, 'b' };
    base::string16 string16_with_null(buf_with_null, length_with_null);

    base::string16 upper_with_null = base::i18n::ToUpper(string16_with_null);
    ASSERT_EQ(length_with_null, upper_with_null.size());
    EXPECT_TRUE(upper_with_null[0] == 0 && upper_with_null[1] == 'A' && upper_with_null[2] == 0 && upper_with_null[3] == 'B');

    base::string16 lower_with_null = base::i18n::ToLower(upper_with_null);
    ASSERT_EQ(length_with_null, upper_with_null.size());
    EXPECT_TRUE(lower_with_null[0] == 0 && lower_with_null[1] == 'a' && lower_with_null[2] == 0 && lower_with_null[3] == 'b');
}

TEST_F(L10nUtilTest, GetDisplayNameForCountry)
{
    base::string16 result = l10n_util::GetDisplayNameForCountry("BR", "en");
    EXPECT_EQ(ASCIIToUTF16("Brazil"), result);

    result = l10n_util::GetDisplayNameForCountry("419", "en");
    EXPECT_EQ(ASCIIToUTF16("Latin America"), result);

    result = l10n_util::GetDisplayNameForCountry("xyz", "en");
    EXPECT_EQ(ASCIIToUTF16("XYZ"), result);
}

TEST_F(L10nUtilTest, GetParentLocales)
{
    std::vector<std::string> locales;
    const std::string top_locale("sr_Cyrl_RS");
    l10n_util::GetParentLocales(top_locale, &locales);

    ASSERT_EQ(3U, locales.size());
    EXPECT_EQ("sr_Cyrl_RS", locales[0]);
    EXPECT_EQ("sr_Cyrl", locales[1]);
    EXPECT_EQ("sr", locales[2]);
}

TEST_F(L10nUtilTest, IsValidLocaleSyntax)
{
    // Test valid locales.
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("fr"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("de"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("pt"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("fil"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("haw"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en-US"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en_US"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en_GB"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("pt-BR"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh_CN"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh_Hans"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh_Hans_CN"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh_Hant"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zh_Hant_TW"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("fr_CA"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("i-klingon"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("es-419"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en_IE_PREEURO"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en_IE_u_cu_IEP"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("en_IE@currency=IEP"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("fr@x=y"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax("zn_CN@foo=bar"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax(
        "fr@collation=phonebook;calendar=islamic-civil"));
    EXPECT_TRUE(l10n_util::IsValidLocaleSyntax(
        "sr_Latn_RS_REVISED@currency=USD"));

    // Test invalid locales.
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax(std::string()));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("x"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("12"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("456"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("a1"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("enUS"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("zhcn"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en.US"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en#US"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("-en-US"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en-US-"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("123-en-US"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("Latin"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("German"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("pt--BR"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("sl-macedonia"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("@"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en-US@"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en-US@x"));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en-US@x="));
    EXPECT_FALSE(l10n_util::IsValidLocaleSyntax("en-US@=y"));
}
